Great Plains
| 401-647M | 2019-06-11
Table of Contents
Index
122
3PYPA
Table of Contents
Index
Maintenance and Lubrication
2. Determine the ideal slack:
Long chains (over 36 inch / 91 cm):
1
/
4
inch per foot (2.1 cm per meter)
Vertical short chains:
1
/
4
in per foot (2.1 cm/m)
Horizontal short chains:
3
/
8
in per foot (4.2 cm/m).
3. Measure the current slack
:
Acting at a right angle to the chain span at the center
of the span, deflect the chain in both directions. The
slack is the distance of the movement.
4. Adjust the idlers for ideal slack.
Chain Clips
Whenever mounting a chain, make sure the clip at the
removable link is oriented to minimize snags.
Refer to Figure 156 (arrow shows chain direction)
Install clip with open end facing away from direction of
chain travel (shown by gray or striped arrows in chain
routing diagrams).
Meter Drive Chain
Refer to Figure 157 (which depicts planter raised)
When performing periodic lubrication, check chain
condition. Replace chain if any frozen kinks are not
corrected by lubrication.
When performing seasonal checks, lower planter to put
chain at minimum idler spring tension.
Check that idler spring length
, measured from outside
of pin to outside of pin, is not shorter than:
7.0 inch (17.8 cm)
Lift spring off idler assembly
. Check that idler
assembly pivots freely. Reattach spring.
Check chain clip orientation. Check chain routing at
shank idler(s)
(see page 157).
Figure 156
Chain Clip Orientation
26482
2
Figure 157
25AP Meter Drive Chain
29616
5
4
3
3
4
5
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